2012-08-01 04:34:13 +08:00
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/* Copyright 2009, UCAR/Unidata and OPeNDAP, Inc.
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See the COPYRIGHT file for more information. */
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#ifndef OCDATA_H
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#define OCDATA_H
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/*
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This structure is used to set up
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pointers into the DataDDS data packet
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to speed up access.
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This has some similarities to OCNODE.
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*/
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struct OCdata {
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OCheader header;
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OCDT datamode;
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OCnode* template;
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OCdata* container; /* link back to container instance */
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size_t index; /* WRT to the container */
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off_t xdroffset; /* Of this instance wrt xxdr_getpos() */
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off_t xdrsize; /* for leafs, and as defined by xdr; if known else 0*/
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size_t ninstances;/* |instances| */
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OCdata** instances; /* vector of instances; if rank > 0, then
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it captures the array elements, else
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it captures the field instances. */
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2014-03-09 11:41:30 +08:00
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size_t nstrings;
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2012-08-01 04:34:13 +08:00
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off_t* strings;
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};
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extern void ocdata_free(OCstate*, OCdata*);
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extern OCerror ocdata_ithfield(OCstate*, OCdata* container, size_t index, OCdata** fieldp);
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extern OCerror ocdata_container(OCstate*, OCdata* data, OCdata** containerp);
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extern OCerror ocdata_root(OCstate*, OCdata* data, OCdata** rootp);
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extern OCerror ocdata_ithelement(OCstate*, OCdata* data, size_t* indices, OCdata** elementp);
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extern OCerror ocdata_ithrecord(OCstate*, OCdata* data, size_t index, OCdata** recordp);
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extern OCerror ocdata_position(OCstate*, OCdata* data, size_t* indices);
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extern OCerror ocdata_recordcount(OCstate*, OCdata*, size_t*);
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extern OCerror ocdata_getroot(OCstate*, OCnode*, OCdata**);
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/* Atomic leaf reading */
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extern int ocdata_read(OCstate*,OCdata*,size_t,size_t,void*,size_t);
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#endif /*OCDATA_H*/
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